S
M
T
W
T
F
S
26
68°
55°
27
69°
56°
28
68°
58°
29
69°
57°
30
67°
58°
31
70°
56°
1
70°
59°
2
69°
56°
3
63°
55°
4
64°
56°
5
67°
55°
6
68°
55°
7
68°
56°
8
70°
56°
9
70°
55°
10
69°
55°
11
69°
58°
12
70°
57°
13
70°
56°
14
71°
57°
15
71°
58°
16
70°
59°
17
70°
56°
18
66°
54°
19
65°
56°
20
70°
57°
21
72°
57°
22
66°
53°
23
Hist. Avg.
69°
56°
24
Hist. Avg.
69°
56°
25
Hist. Avg.
69°
56°
26
Hist. Avg.
69°
56°
27
Hist. Avg.
69°
56°
28
Hist. Avg.
69°
56°
29
Hist. Avg.
69°
56°
30
Hist. Avg.
69°
56°
31
Hist. Avg.
69°
56°
1
Hist. Avg.
70°
56°
2
Hist. Avg.
70°
56°
3
Hist. Avg.
70°
56°
4
Hist. Avg.
70°
56°
5
Hist. Avg.
70°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in San Francisco
San Francisco's August 2026 forecast shows daily high temperatures ranging from 63° to 72°, with overnight lows between 53° and 59°. The average high for August is 69° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Francisco. See also: September | October | November.
